Isaac Holmes, MD
NPI 1689994881 · Internal Medicine Physician · Chicago, IL
Enrolled with Medicare as Order and Referring Only - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Isaac Holmes, MD is a Internal Medicine Physician provider in Chicago, IL (NPI 1689994881).
Provider details
- NPI number
- 1689994881
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 125:058041 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
16 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 35 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 79 | 27 |
| Amlodipine Besylate | 79 | 28 |
| Lisinopril | 68 | 21 |
| Metformin Hcl | 68 | 21 |
| Levothyroxine Sodium | 38 | 13 |
| Famotidine | 36 | 12 |
| Losartan Potassium | 36 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-06-10
- Last updated
- 2016-07-25
Frequently asked questions
- What is Isaac Holmes's NPI number?
- Isaac Holmes's National Provider Identifier (NPI) is 1689994881, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Isaac Holmes's specialty?
- Isaac Holmes is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Isaac Holmes located?
- Isaac Holmes's practice location on file with NPPES is 1653 W Congress Pkwy, Chicago, IL 60612-3833.
- What is Isaac Holmes's phone number?
- The practice phone number listed in the NPPES registry for Isaac Holmes is (312) 563-2875.
- Does Isaac Holmes accept Medicare?
- Isaac Holmes is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Isaac Holmes's NPI active?
- Yes — Isaac Holmes's NPI (1689994881) is active in the NPPES registry as of the last update on 2016-07-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.